Morro da Mina

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Location - Brazil; -20.58, -43.98

Age (of protore) - 2070-1860 Ma

Original size - 4.5 million tonnes of Mn

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References

Cabral, A.R., Zeh, A., Vianna, N.C., Ackerman, L., Pašava, J., Lehmann, B. and Chrastný, V., 2019. Molybdenum-isotope signals and cerium anomalies in palaeoproterozoic manganese ore survive high-grade metamorphism. Scientific reports, 9(1), p.4570.

Leverett, P., Williams, P.A., and Hibbs, D.E., 2008, Ca-Mg-Fe-rich rhodonite from the Morro da Mina Mine, Conselheiro Lafaiete: Mineralogical Record, v. 39, p. 125-130.

Herz, N., and Banerjee, S., 1973, Amphibolites of the Lafaiete, Minas Gerais, and the Serro do Navio manganese deposits, Brazil: Economic Geology, v. 68, p. 1289-1296.

Horen, A., 1953, The manganese mineralization at the Merid Mine, Minas Gerais, Brazil, Unpublished Ph.D. Thesis, Harvard University, 224 p.

 

Ce anomaly

 

Extrapolation to clastic-free value

Eu anomaly

Extrapolation to zero clastics

 

C-isotopes of graphite